:root{
    --line-border-fill:#3498db;
    --line-border-empty: #e0e0e0;
}

*{
  box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body{
    background-color: #f6f7fb;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}
.container{
    text-align: center;
}
.progress-container{
    display: flex;
    justify-content: space-between;
    width: 350px;
    margin-bottom: 30px;
    position: relative;
}
.progress-container::before{
    content: '';
    background-color: var(--line-border-empty);
    height: 4px;
    width: 100%;
    position: absolute;
    top: 50%;
    /* left: 0; */
    z-index: -1;
    transform: translateY(-50%);
}
.progress{
    background-color: var(--line-border-fill);
    height: 4px;
    width: 0%;
    top: 50%;
    position: absolute;
    z-index: -1;
    transform: translateY(-50%);
    transition: 0.3s ease;
}
.circle{
    background-color: white;
    color: #999;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border:3px solid var(--line-border-empty);
    transition: 0.3s ease;
}
.circle.active{
    border: 3px solid var(--line-border-fill);
}
.btn{
    background-color: var(--line-border-fill);
    padding: 8px 30px;
    margin: 5px;
    border: 0;
    color: white;
    border-radius: 5px;
    font-size: 14px;
    box-shadow: 2px 2px 5px var(--line-border-fill);
}
.btn:active{
    transform: scale(0.98);
}
.btn:focus {
    outline: 0;
  }
  .btn:disabled {
    background-color: var(--line-border-empty);
    cursor: not-allowed;
  }
  


